Pulley.



VR. W. DULL.

PULLBY.

APPLIOATION FILED 00T. 21, 1910.

Patented June 11, 1912.

ATTORNEY T OFFICE.

RAYMOND W. DLL, OF AURORA, ILLINOIS.

PULLEY.

Specification of Letters Patent.

Patented J une 11, 1912.

Application filed October 21, 1910. Serial No. 588,351.

To all whom it may concern:

Be it known that I, RAYMOND W. DULL, a citizen of the United States,residing at 395 Garfield avenue, Aurora, in the county of Kane and Stateof Illinois, have invented a new and useful Improvement in Pulleys, ofwhich the following is a specification.

My invention relates to improvements in pullleys of the type known asthe split pulley, in which the pulley is built up of two similarly madeparts fastened together on the shaft, and has for its object theproduction of such a pulley in which each of the parts or halves is madefrom a single piece or sheet of metal, and in which the arm and theport-ion which fits on the shaft is partially separated and formed fromthe rim portion, the making of which requires merely the use of forgingdies. Its fur ther object is to produce a split pulley which is verysimple and inexpensive to manufacture and one which is very durable andwhich can be very readily and rigidly secured on the shaft. I attainthese objects by the construction illustrated in the accompanyingdrawings, in which Figure l is a top plan view of my pulley. Fig. 2 is aside view of the pulley. Fig. 3 is a side view of a modification for asquare shaft showing` only a portion of the pulley.

Similar numerals refer to similar parts throughout the several views.

In the drawings l represents the rim portion of each half of my pulley.From this rim portion an arm portion comprising the parts 2, part 3 andparts 5, is partially cut and formed as shown in Fig. 2. The part 3 isformed concentric with the'rim l and is the part which fits the shaft 4on which the pulley is mounted. For square shafts this could be angular.(See Fig. 3.) Adjacent to this part 3, on each side thereof, is astraight portion 5 having an aperture through which a bolt 6, having anut 7 passes and unites the two halves of the pulley as shown in Fig. 2of the drawing. The parts 2 can be made of any convenient shape, theshape shown in the Fig. 2 being one which adapts itself readily to theshap ing or bending processes necessary and which I have foundpracticable.

In making my split pulleys each half is formedwith the same die, eachhalf being the same and formed from a single piece or sheet of metal,although it is evident that I can use a pipe or tube to form up such apulley as the arm portion can be formed from the rim the same as fromthe sheet of metal, and the rim then sawed to separate the pulley intothe two halves, or can be left solid as desired.

From the above description of my split pulley it is seen that it isparticularly well adapted for very wide belts, such as are used for beltconveyors, as any number of arm portions can be cut or sheared from therim and formed as shown. It can also be used with only one rim and onearm portion for taking care of any narrow belt. It is seen that mypulley can be readily attached to the shaft as the nuts 7 and the bolts6 are exposed and accessible, there being no rim portion to interfere atthis point.

Any of the usual fastenings can be applied at the rim to further securethe alinement of the halves of the pulleys, if desired, but I do notiind that any fastening at the rim is necessary.

It will be understood, of course, that while I have here shown one formof my pulley, I do not wish to limit myself to the exact form or shapeof the parts shown, but desire to have it taken in a sense diagrammaticof any or all the forms of the same which come within the scope of myclaims.

I claim:

l. A pulley having two similarly formed members, each member comprisingseparated rim portions and an intermediate arm integral with said rimportions, said arm having a suitably shaped portion adapted for securingthe members to a suitably shaped shaft.

2. A pulley having a plurality of similarly formed members, each membercomprising separated rim portions and intermediate arms integral withsaid rim portions, said arms having a suitably shaped portion adaptedfor securing the members to a suitably shaped shaft.

3. In a. pulley a member comprising separated rim portions andintermediate arms integral with said rim portions, said arms having asuitably shaped portion adapted for securing said member to a suitablyshaped shaft.

Y RAYMOND W. DULL.

IVitnesses:

C. N. JANES,

HARRY SMALL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, I). C.

